check if a checkbox is checked jquery

Question

Does anyone know why this isn't working. It will always print 'unchecked'.

<html> <head> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript"> function msg(x) { if($(x).attr('checked')){ alert('checked!!'); } else{ alert('unchecked'); } } </script> </head> <body> <form> <input type="checkbox" id="fname2" onClick="msg(this.id)" /><br/> </form> </body> </html>

gen_Eric · Accepted Answer · 2010-11-15 05:08:23Z

6

You are sending this.id to the function, then you are wrapping it in the $(). This does not work. You need just to send this to msg: onClick="msg(this)".

answered Nov 15, 2010 at 5:08

gen_Eric

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gen_Eric Over a year ago

If you want to send IDs to msg, you need to do: $('#'+x).

Nikola K. · Accepted Answer · 2012-07-22 12:18:28Z

2

Use

function chkChecked(elmt) { if($(elmt).is(':checked')) { alert('checked!!'); } else alert('unchecked'); }

edited Jul 22, 2012 at 12:18

Nikola K.

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answered Mar 21, 2012 at 7:32

Poly

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Comments

WolfRevoKcats · Accepted Answer · 2010-11-15 05:17:17Z

You need a # to tell jQuery that you want to select an id X rather than an element X.

if($('#'+x).attr('checked'))

Or, if you change onClick="msg(this.id)" to onClick="msg(this)" you can use:

if($(x).attr('checked'))

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